Well-drilling mechanism.



S. N. HALL.

WELL DRILLING MECHANISM. APPLICATION FiLED MAY 17, 1909.

Patented Jan. 14, 1918.

2 SHEETSSHEET ATTORNEY r s. N. HALL. WELL DRILLING MECHANISM.

' I a l APPLICATION FILED MAY 17, 1909.

iamw fis fin Patented Jan.'14,1913.

if, M

T i i ri TENT SAMUEL N. HALL, OF HOUSTON, TEXAS.

"WELL-DRILLING MECHAHISIII.

e tollowint is a specification.

invention relates to new and useful drilling apparatuses to an apparatusfor JJ, inzprm'tnncnts in well and more particnlarl} screwing andunscrewing pip sections.

It a weil known fact that in drilling a well, the pipe is removed fromthe hole and rcph red several times. Each time the pipe removed it isnecessary to unscrew each. s etion from the other, except where thederrick is high enough to take two or tour sections, in which case onlyever second or fourth section is unscrewed. When the secti ns are placedback in the hole, they must he sta t-wed together. Where the pipe isseveral hundred feet in length, this operation requires considerabletime and labor.

The present method of screwing and unscrewing is to raise the jointabove the rotary and by means of chain tongs connect or disconnect thesections; or by clampinc one section with the guide rollers of therotary and holding the upper section with chain (ones. This lattermethod requires the rotating ot' the rotary in the opposite direction toits usual rotation and throws all the weight on the hearings of therotary. 'lhesc methods are not only'slow and lahorions, hutunsatisfactory, as the threads are often stripped and jammed.

.rlr invention contemplates an apparatus adapted to he attached totheframe of the rotary and operated by the driving mechiinism of therotary, while the latter is at. rest. The screwing and unscrewing beingaccomplished by mechanical means Without manual aid and in much lesstime.

The object of the invention is to provide such an apparatus, and onewhich will be strong, durable, efiieient and simple, and comparativelyinexpensive to prothnrc and operate, also one in which the several partswill not be likely to get out of working order.

With the above and other objects in view, the invention has relation tocertain novel features of construction and operation. an example ofwhich is descrihlnl in the speci Specification of Letters Patent.

nt in ell-Drilling Mechanism,

Patented. Jan. it i Application filed may 1?, 196-3. Serial No. 4983.23.

tieation and illustrated in the accom panydrawings, wherein:

Figure 1 is a side elevation showing" the apparatus attached to anordinary rotary, Fig: 2 is a transverse section taken on the line zz'-e? of Fig. 1 and looking in the direction of the arrow, Fig. 3 isaplan View the apparatus, Fig. 4: is a plan view of the ratchet clamp, 5is an elevation of the same 1 a portion of the pipe, Fig, 8 i he camwheel, port-ions being orolten away 0 ill strate the rollers, lir :s andguide arms, Fi "4" is detail section showing wrench and its pawl, Fig. 8is a plan View of a modified form of wrench omitting the ratchet clamp,and Fig, 9 is a vertical. section of the same.

In the drawings, the numeral 1, designates the had frame of an ordinaryrotary, 2 toe driving shaft, 3 the drivingsprocket, 4 the clutch, 5 thetable and 6 the guide rollers. These parts may be of any approvedconstruction and form no particular part of my invention.

At each side of the bed frame 1, uprights 7 are erected adjacentv thetable 5 and the driving sprocket 3. These uprights extend a shortdistance above the table and carry at their upper ends cross beams 8.This construction forms the support on which my apparatus is mounted.

On each cross beam, 21 Vertical end plate.

the rotary, which is placed suhstam'ially in the longitudinal center ofthe bed frame.

To impart a swinging movement to the wrench hereinafter described, agrooved. cam wheel 12 having an extended hub 13 is iounted on the shaft11, being caused to turn therewith by means of an elongated key 142.

Guide "frames are alined with the wheel and its huh and comprise sleeves15 adapted to slide on the rods 10, the sleeves on each side beingconnected by curved arms 16, as shown in 2. Referring; to Fig. 6, aswell as to Fig. 2, it will be seen that a space provided hetweeu eacharm and the wvrench is provided. The clamp is removed by loosening thebolt I have found that it is possible to omit the -e'chet clamp 20 andtherefore in Figs. 8 and 9 have shown a modified form in which sa d partomitted. in this case the wrench member 21 as well as the jaw 26 areprovided with depending sleeve portions 42 ada 'ited toienibrace thepipe and support the v wrench on the collar C. The pawl or dogsubstantially the same as the pawl 28 parts and their operation, exceptthat d pawl or dog 2% is provided with la 1'72"; on its angular workingedge, so that uhirhe er way it. is thrown, the teeth will bite into thepipe, and thus turn the latter when the wrench is swung.

il hat I claim, is:

1. In a well pipe screwing and unscrewing ap 'iaratus, the combinationwith a suit-- able wrench adapted to surround and impartrotary motion toa well pipe section, of means for imparting a rocking movement to thewrench, comprising, horizontal) guides, guide frames mounted to slide onguides, links extending from the guide frames and connected at theirfree ends to opposite sides of the wrench, and means for imparting areciprocating movement to the guide frames.

:2. In a well pipe screwing and unscrewing apparatus, the combinationwith a suitable wrench adapted to surround and impartrolary motion tothe well pipe section, of means for imparting a rocking movement to thewrench, comprising, a support, horizontal guides mounted in fixedrelation on the support, guide frames mounted to reciprocate on theguides, links pivoted to the-guide frames and connected at their freeends with opposite sides of the wrench, a rotary device for imparting areciprocating movement to the guide frames, and means for' impartingmotion to the rotary device.

In a well pipe screwing and unscrewing apparatus, the combination withlinks and nurans tor rcci 'irocatiug the links in alternate relation. ofa wrench having connection at pposite sides with the free ends of thelinks and adapted to surround a well pipe tion, and a spring heldreversible memher mounted on the wrench for imparting a l at &

rotary motion to the well pipe section, the member being reversibleindependently of the wrench.

4. In a well pipe screwing and unscrewing apparatus, the combinationwith links and means for reciprocating the links in alternate relation,of a wrench having connection at opposite sides with the free ends ofthe links and adapted to surround a well pipe section, and a spring heldpawl reversibly mounted on the wrench for imparting a rotary motion tothe well section.

5. In a well pipe screwing and unscrewing apparatus, the combinationwith links and means for reciprocating the links in alternate relation,of a wrench having connection at opposite sides with the free ends ofthe links and adapted to surround a well. pipe section, a pawl mmuted onthe wrench for imparting a rotary motion to the well pipe section, and aspring held arm connected to the pawl for reversing the same.

6. In a well pipe screwing and unscrewing apparatus, the combinationwilh links and means for reciprocating the links in alternate relation,of a wrench having connection at opposite sides with the free ends,

of the links and adapted to surround a well pipe section, a pawl mountedon the wrench for imparting a rotary motion to the well pipe section, anarm projecting from the pawl, projections on the wrench, and a springconnected to the end of the arm and. adapted to engage either of theprojections whereby the pawl is held under tension and may be reversed.

7. Ina well pipe screwing and unscrewing apparatus, the combination witha suitable wrench adapted to surround and impart rotary motion to a wellpipe section, of means for imparting a rocking movement to the wrench,comprising, a support, horizontal separated guides mounted in fixedrelation on the support, guide frames mounted to reciprocate on andbetween the guides, links pivoted to opposite sides of the guide frameand conncctedat their free ends with opposite sides of the wrench, ashaft. adja cent the guides, a projection on each guide frame. a camwheel mounted on the sha't'tand engaging the projection, and means forimparting a rotary movement to the shaft.

In testimony whereot l have signed my name in the presence of twowitnesses.

SAMUEL N. l-IALLI Vitn esses R. H. HANNA, M. B. ScuLnY.

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